package com.czy.seed.mvc.auth;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;

import java.util.Collection;
import java.util.Iterator;

public class CustomAccessDecisionManager implements AccessDecisionManager {
    @Override
    public void decide(Authentication authentication, Object object, Collection<ConfigAttribute> configAttributes) throws AccessDeniedException, InsufficientAuthenticationException {
        if( configAttributes == null ) {
            return ;
        }

        Iterator<ConfigAttribute> ite = configAttributes.iterator();

        while( ite.hasNext()){
            ConfigAttribute ca = ite.next();
            String needRole = ((SecurityConfig)ca).getAttribute();
            for( GrantedAuthority ga: authentication.getAuthorities()){
                if(needRole.trim().equals(ga.getAuthority().trim())){
                    return;
                }
            }
        }
        throw new AccessDeniedException("权限不足");
    }

    @Override
    public boolean supports(ConfigAttribute attribute) {
        return true;
    }

    @Override
    public boolean supports(Class<?> clazz) {
        return true;
    }
}
